Is Singapore still punishing heavily people who graffiti or litter?

Yes but if you are migrant labouers who riot violently in Little India  you will be ok

yes,you will be scolded and occasionally  get a spanking！

yes of course , ten strokes of the

ratan cane on the butt for graffiti

after two strokes you wont be able to walk

properly for a month

Yes, the penalties are still there. Singaporeans are proud of their country's cleanness and they seem to like the strict law. Recently, there's a lot of foreign workers who litter around when they're not caught on guard and the locals express condemns on the internet. 

I hope so.........

of course.  I went to SG last year.  it was very clean and I saw no graffiti.   Unlike, cities in California..... I went to a LAKERS game and the street were so thrashy and there were graffiti everywhere.     which one would you choose?